A quick demonstration of how CDTL works
You can also track a secondary thing as a 'spark' on the timeline at the same time as normal tracking. The image shows the energy ticks on a rogue.
A demonstration of how the timeline can be used to track various things as if it were a status bar, as seen in the image showing Energy ticks
The icons will move down the bar at a linear speed based on how long the cooldown is total
The icons will move down the bar at different speeds based on how much time is left.
You can chose to have icons stack on each other to increase visibility. You can also chose how much overlap there is on the icons